Question

Define specific latent heat of fusion, $L_f$.

• A. The specific heat of fusion of a substance is the quantity of heat required to convert a unit mass of the substance from liquid to gaseous state at its boiling point.
• B. The specific heat of fusion of a substance is the quantity of heat required to convert a unit mass of the substance from solid to liquid state at its melting point.
• C. The specific heat of fusion of a substance is the quantity of heat required to raise the temperature of unit mass of the substance by $1^{o}C$.
• D. The specific heat of fusion of a substance is the quantity of heat required to lower the temperature of unit mass of the substance by $1^{o}C$.

Answer 1

The correct option is B The specific heat of fusion of a substance is the quantity of heat required to convert a unit mass of the substance from solid to liquid state at its melting point.

The specific heat of fusion, $L_f$ of a substance is the quantity of heat required to convert a unit mass of the substance from solid to liquid state at its melting point.